Ronaldo was shown a straight red card and left the field in tears, throwing his participation in both games against former club Manchester United into doubt.

UEFA rules dictate that the five-time Ballon d’Or winner must serve an automatic one-game ban with no right to appeal – ruling him out of Juve’s clash with Young Boys on October 2 – although the automatic three-match suspension imposed for violent conduct in the Premier League does not apply in the Champions League.

However, UEFA could increase the punishment depending on whether a panel considers the offence to be serious enough, with a two-game ban denying Ronaldo the chance to return to Old Trafford and a three-match suspension ruling him out of the reverse fixture against United too.